diff options
Diffstat (limited to 'lib/dialyzer/test/small_tests_SUITE_data/src/or_bug.erl')
| -rw-r--r-- | lib/dialyzer/test/small_tests_SUITE_data/src/or_bug.erl | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/dialyzer/test/small_tests_SUITE_data/src/or_bug.erl b/lib/dialyzer/test/small_tests_SUITE_data/src/or_bug.erl new file mode 100644 index 0000000000..fb8f6558b8 --- /dev/null +++ b/lib/dialyzer/test/small_tests_SUITE_data/src/or_bug.erl @@ -0,0 +1,24 @@ +%%--------------------------------------------------------------------------- +%% From: Per Hedeland <[email protected]> +%% Date: 11 Feb 2010 +%% +%% The code below demonstrates a bug in dialyzer - it produces the warning: +%% Clause guard cannot succeed. +%% The variable Cs was matched against the type any() +%% for the first test/1 clause, but of course the claim can easily be easily +%% refuted by calling test(#cs{}). +%%--------------------------------------------------------------------------- + +-module(or_bug). + +-export([test/1]). + +-record(cs, {children = [], actions = []}). + +-define(is_internal(X), ((X#cs.children =/= []) or + (X#cs.actions =/= []))). +-define(has_children(X), (X#cs.children /= [])). + +test(Cs) when not ?is_internal(Cs) -> foo; +test(Cs) when not ?has_children(Cs) -> bar; +test(Cs) when Cs#cs.children =/= [] -> baz. |